Xe-Pian Xe-Namnoy Hydroelectric Power Project

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Xe-Pian Xe-Namnoy Hydroelectric Power Project
Location: Attapeu (Sanamxay) Province and Champasak Province , Laos
Xe-Pian Xe-Namnoy Hydroelectric Power Project (Laos)
Xe-Pian Xe-Namnoy Hydroelectric Power Project
Coordinates 15 ° 1 '31 "  N , 106 ° 36' 34"  E Coordinates: 15 ° 1 '31 "  N , 106 ° 36' 34"  E
Data on the structure
Lock type: Weir
Construction time: 2013 to 2019
Power plant output: 410 MW
Operator: Xe Pian-Xe Namnoy Power Company (PNPC)

The Xe-Pian Xe-Namnoy Hydroelectric Power Project is a hydropower project in Laos . It is located partly in the Champasak province and in the Sanamxay district of the southeastern Attapeu province on the border with Cambodia and consists of two main dams and five secondary dams. According to information from Ratch , one of the companies involved, the system went online on December 6, 2019.

History of the establishment

  • November 2008 Completion of the feasibility study
  • February 2013 construction start
  • Planned completion and commissioning at the end of 2018 (status: before the dam breach July 2018)

Operator and plant

The dam and the associated, not yet completed power station were planned and built by the Xe Pian-Xe Namnoy Power Company (PNPC). The feasibility study for the hydropower project was completed in November 2008. Construction of the project began in February 2013. When fully completed, the power plant will have an output of 410 MW and deliver around 1,860 GWh annually. 90 percent of this is to be delivered to Thailand .

PNPC is a joint venture founded in March 2012 by SK Engineering & Construction (SK E&C, a subsidiary of the South Korean SK Group ), the semi-state Thai group Ratchaburi Electricity Generating Holding (RATCH), the South Korean energy provider Korea Western Power (KOWEPO, a subsidiary the Korea Electric Power Corporation KEPCO) and the Laotian state companies Lao Holding State Enterprise (LHSE) was founded. SK E&C holds 24% of PNPC, LHSE 26%, RATCH and KOWEPO own the remaining shares in the project.

The project is expected to cost around US $ 1.02 billion (about 870 million euros). This is the first project in which the property is being transferred to the customer ( Build Operate Transfer , BOT) that the South Korean company is carrying out in Laos before the concession period expires .

Full commercial operation was planned for 2019.

Technical specifications

The project consists of three reservoirs : the Houay Makchanh Reservoir , the Xe-Pian Reservoir and the Xe-Namnoy Reservoir fed by these two . From this third reservoir, the water is led to the power station in an underground tunnel . The tunnel consists of a 13.7 km long low pressure tunnel, a 458 m long vertical tunnel, a high pressure shaft 1564 m long and finally a pressure pipeline of 768 m. The power plant can generate 410 megawatts of electrical energy with one Pelton turbine and three Francis turbines . From there, the water is led into the Xe Kong River in a 6.3 km long channel .

The project includes several dams. The most important are:

Dam burst 2018

The dam collapsed on July 23, 2018 at 8 p.m. local time after heavy rainfall. On Sunday, July 22nd, workers reportedly found damage to the dam and evacuated nearby villages. Around 5 million cubic meters of water were released, flooding primarily six villages in the Sanamxay district in Attapeu province on the Xe-Pian River: Yai Thae , Hinlad , Mai , Thasengchan , Tha Hin and Samong . Hinlad and Mai were hardest hit. The construction work is said to have been almost finished by the time the dam broke and it was not a main dam that had broken, but the saddle dam "D" (Saddle Dam D), which was 8 meters wide, 770 meters long and 16 meters high. The saddle dam D was constructed to divert water.

Hundreds of people are missing and 6600 people (1300 families) are believed to have lost their home or apartment. Two days after the dam broke, 26 deaths are reported.

See also

Web links

Individual evidence

  1. ↑ Xe-Pian Xe-Namnoy Power Co., Ltd. - Project In Brief .
  2. ↑ Laos dam collapse: Many feared dead as floods hit villages , BBC News of July 24, 2018.
  3. ↑ Paritta Wangkiat: The unseen human cost of cheap power. In: Bankok Post . July 29, 2020, accessed on August 28, 2020 .
  4. ↑ Ratch Group disc losed commercial operational of Xe-Pian Xe-Namnoy hydroelectric power plant. December 6, 2019, accessed on August 28, 2020 .
  5. ↑ a b c d PM Suspens Monthly Meeting, Leads Ministers To Flooded Sanamxay , Lao News Agency, July 24, 2018.
  6. ↑ Dead and hundreds missing in Laos , Wiener Zeitung of July 24, 2018.
  7. ↑ Attapeu Asks For Relief Aid For Flood Victims , Lao News Agency, July 24, 2018.
  8. ↑ Hundreds of people missing after the dam burst in Laos , Deutsche Welle, July 24, 2018.
  9. ↑ a b c d Technical Information. Accessed July 23, 2018 .
  10. ↑ Hundreds of people missing after the dam burst in Laos , Deutsche Welle, July 24, 2018.
  11. ↑ Laos dam collapse: Many feared dead as floods hit villages , BBC News of July 24, 2018. - Time scale from Sunday, July 22, 9:00 p.m. local time (2:00 p.m. GMT) to Tuesday, July 24, 1:30 a.m. "At least 20 dead.
  12. ↑ Attapeu Asks For Relief Aid For Flood Victims , Lao News Agency, July 24, 2018.
  13. ↑ Dam break in Laos: Hundreds of people missing, several dead , Frankfurter Neue Presse from July 24, 2018.
  14. ↑ Laos dam collapse: Many feared dead as floods hit villages , BBC News of July 24, 2018.
  15. ↑ Scarlett Evans: Hundreds missing after Laos dam collapses , power-technology.com of July 24, 2018.
  16. ↑ PM Suspens Monthly Meeting, Leads Ministers To Flooded Sanamxay , Lao News Agency, July 24, 2018.
  17. ↑ 26 dead after a dam breach in Laos tagesspiegel.de, July 25, 2018, accessed July 26, 2018.